Highlight mask automatically and create copy and invert fort masks

After a mask is automatically created, the mask should be visible as it is necessary to assess the accuracy of the mask.  If others like the mask nor shown, this could be a general preference i.e Mask is displayed automatically after mask generation.

Create duplicate mask and invert.  I do this all the time as I often want the background to be the total inverse of the subject selection (after being refined) and not necessarily what CO thinks is the background.